@JeremyECrawford If you can attack twice within an attack action, could you attack twice using your reaction upon taking the ready action?
— Regan Knight (@Day_Knights) March 5, 2016
The Extra Attack feature specifies that it works on your turn. It doesn't work on someone else's. #DnD https://t.co/pif67Y3b6N
— Jeremy Crawford (@JeremyECrawford) March 15, 2016